Match the LIST-I with LIST-II
| LIST-I | LIST-II |
|---|---|
| Types of inheritance | Examples |
| A. Incomplete dominance | I. Skin colour in man |
| B. Polygenic inheritance | II. ABO blood group in man |
| C. Pleiotropy | III. Antirrhinum sp. |
| D. Co-dominance | IV. Phenylketonuria |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-III, B-I, C-IV, D-II
(A) Incomplete dominance — this matches (III) Antirrhinum sp.. In snapdragon, a cross of red and white flowers gives pink F1 flowers, because the dominant allele does not fully hide the other. The F2 ratio is 1 : 2 : 1.
(B) Polygenic inheritance — this matches (I) Skin colour in man. A trait controlled by three or more genes, each adding to the effect, is polygenic. Skin colour is one such trait.
(C) Pleiotropy — this matches (IV) Phenylketonuria. In pleiotropy one gene affects many traits. The faulty gene in phenylketonuria causes mental retardation and also reduced hair and skin pigment.
(D) Co-dominance — this matches (II) ABO blood group in man. The alleles IA and IB are both expressed together in the blood group AB.
Note: A similar question was also asked in CUET (UG) 2025 on 27-05-2025 (Slot 2).